KVM: selftests: Rename 'evmcs_test' to 'hyperv_evmcs'

Conform to the rest of Hyper-V emulation selftests which have 'hyperv'
prefix. Get rid of '_test' suffix as well as the purpose of this code
is fairly obvious.

Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-49-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 315 deletions

diff --git a/tools/testing/selftests/kvm/x86_64/evmcs_test.c b/tools/testing/selftests/kvm/x86_64/evmcs_test.c
deleted file mode 100644
index ba09d300c953..000000000000
--- a/tools/testing/selftests/kvm/x86_64/evmcs_test.c
+++ /dev/null
@@ -1,315 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2018, Red Hat, Inc.
- *
- * Tests for Enlightened VMCS, including nested guest state.
- */
-#define _GNU_SOURCE /* for program_invocation_short_name */
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <linux/bitmap.h>
-
-#include "test_util.h"
-
-#include "kvm_util.h"
-
-#include "hyperv.h"
-#include "vmx.h"
-
-static int ud_count;
-
-static void guest_ud_handler(struct ex_regs *regs)
-{
-	ud_count++;
-	regs->rip += 3; /* VMLAUNCH */
-}
-
-static void guest_nmi_handler(struct ex_regs *regs)
-{
-}
-
-static inline void rdmsr_from_l2(uint32_t msr)
-{
-	/* Currently, L1 doesn't preserve GPRs during vmexits. */
-	__asm__ __volatile__ ("rdmsr" : : "c"(msr) :
-			      "rax", "rbx", "rdx", "rsi", "rdi", "r8", "r9",
-			      "r10", "r11", "r12", "r13", "r14", "r15");
-}
-
-/* Exit to L1 from L2 with RDMSR instruction */
-void l2_guest_code(void)
-{
-	u64 unused;
-
-	GUEST_SYNC(7);
-
-	GUEST_SYNC(8);
-
-	/* Forced exit to L1 upon restore */
-	GUEST_SYNC(9);
-
-	vmcall();
-
-	/* MSR-Bitmap tests */
-	rdmsr_from_l2(MSR_FS_BASE); /* intercepted */
-	rdmsr_from_l2(MSR_FS_BASE); /* intercepted */
-	rdmsr_from_l2(MSR_GS_BASE); /* not intercepted */
-	vmcall();
-	rdmsr_from_l2(MSR_GS_BASE); /* intercepted */
-
-	/* L2 TLB flush tests */
-	hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | HV_HYPERCALL_FAST_BIT, 0x0,
-			 HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | HV_FLUSH_ALL_PROCESSORS);
-	rdmsr_from_l2(MSR_FS_BASE);
-	/*
-	 * Note: hypercall status (RAX) is not preserved correctly by L1 after
-	 * synthetic vmexit, use unchecked version.
-	 */
-	__hyperv_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | HV_HYPERCALL_FAST_BIT, 0x0,
-			   HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES | HV_FLUSH_ALL_PROCESSORS,
-			   &unused);
-
-	/* Done, exit to L1 and never come back.  */
-	vmcall();
-}
-
-void guest_code(struct vmx_pages *vmx_pages, struct hyperv_test_pages *hv_pages,
-		vm_vaddr_t hv_hcall_page_gpa)
-{
-#define L2_GUEST_STACK_SIZE 64
-	unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
-
-	wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID);
-	wrmsr(HV_X64_MSR_HYPERCALL, hv_hcall_page_gpa);
-
-	x2apic_enable();
-
-	GUEST_SYNC(1);
-	GUEST_SYNC(2);
-
-	enable_vp_assist(hv_pages->vp_assist_gpa, hv_pages->vp_assist);
-	evmcs_enable();
-
-	GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));
-	GUEST_SYNC(3);
-	GUEST_ASSERT(load_evmcs(hv_pages));
-	GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);
-
-	GUEST_SYNC(4);
-	GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);
-
-	prepare_vmcs(vmx_pages, l2_guest_code,
-		     &l2_guest_stack[L2_GUEST_STACK_SIZE]);
-
-	GUEST_SYNC(5);
-	GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);
-	current_evmcs->revision_id = -1u;
-	GUEST_ASSERT(vmlaunch());
-	current_evmcs->revision_id = EVMCS_VERSION;
-	GUEST_SYNC(6);
-
-	vmwrite(PIN_BASED_VM_EXEC_CONTROL, vmreadz(PIN_BASED_VM_EXEC_CONTROL) |
-		PIN_BASED_NMI_EXITING);
-
-	/* L2 TLB flush setup */
-	current_evmcs->partition_assist_page = hv_pages->partition_assist_gpa;
-	current_evmcs->hv_enlightenments_control.nested_flush_hypercall = 1;
-	current_evmcs->hv_vm_id = 1;
-	current_evmcs->hv_vp_id = 1;
-	current_vp_assist->nested_control.features.directhypercall = 1;
-	*(u32 *)(hv_pages->partition_assist) = 0;
-
-	GUEST_ASSERT(!vmlaunch());
-	GUEST_ASSERT_EQ(vmreadz(VM_EXIT_REASON), EXIT_REASON_EXCEPTION_NMI);
-	GUEST_ASSERT_EQ((vmreadz(VM_EXIT_INTR_INFO) & 0xff), NMI_VECTOR);
-	GUEST_ASSERT(vmptrstz() == hv_pages->enlightened_vmcs_gpa);
-
-	/*
-	 * NMI forces L2->L1 exit, resuming L2 and hope that EVMCS is
-	 * up-to-date (RIP points where it should and not at the beginning
-	 * of l2_guest_code(). GUEST_SYNC(9) checkes that.
-	 */
-	GUEST_ASSERT(!vmresume());
-
-	GUEST_SYNC(10);
-
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL);
-	current_evmcs->guest_rip += 3; /* vmcall */
-
-	/* Intercept RDMSR 0xc0000100 */
-	vmwrite(CPU_BASED_VM_EXEC_CONTROL, vmreadz(CPU_BASED_VM_EXEC_CONTROL) |
-		CPU_BASED_USE_MSR_BITMAPS);
-	set_bit(MSR_FS_BASE & 0x1fff, vmx_pages->msr + 0x400);
-	GUEST_ASSERT(!vmresume());
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ);
-	current_evmcs->guest_rip += 2; /* rdmsr */
-
-	/* Enable enlightened MSR bitmap */
-	current_evmcs->hv_enlightenments_control.msr_bitmap = 1;
-	GUEST_ASSERT(!vmresume());
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ);
-	current_evmcs->guest_rip += 2; /* rdmsr */
-
-	/* Intercept RDMSR 0xc0000101 without telling KVM about it */
-	set_bit(MSR_GS_BASE & 0x1fff, vmx_pages->msr + 0x400);
-	/* Make sure HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP is set */
-	current_evmcs->hv_clean_fields |= HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
-	GUEST_ASSERT(!vmresume());
-	/* Make sure we don't see EXIT_REASON_MSR_READ here so eMSR bitmap works */
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL);
-	current_evmcs->guest_rip += 3; /* vmcall */
-
-	/* Now tell KVM we've changed MSR-Bitmap */
-	current_evmcs->hv_clean_fields &= ~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
-	GUEST_ASSERT(!vmresume());
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ);
-	current_evmcs->guest_rip += 2; /* rdmsr */
-
-	/*
-	 * L2 TLB flush test. First VMCALL should be handled directly by L0,
-	 * no VMCALL exit expected.
-	 */
-	GUEST_ASSERT(!vmresume());
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_MSR_READ);
-	current_evmcs->guest_rip += 2; /* rdmsr */
-	/* Enable synthetic vmexit */
-	*(u32 *)(hv_pages->partition_assist) = 1;
-	GUEST_ASSERT(!vmresume());
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == HV_VMX_SYNTHETIC_EXIT_REASON_TRAP_AFTER_FLUSH);
-
-	GUEST_ASSERT(!vmresume());
-	GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL);
-	GUEST_SYNC(11);
-
-	/* Try enlightened vmptrld with an incorrect GPA */
-	evmcs_vmptrld(0xdeadbeef, hv_pages->enlightened_vmcs);
-	GUEST_ASSERT(vmlaunch());
-	GUEST_ASSERT(ud_count == 1);
-	GUEST_DONE();
-}
-
-void inject_nmi(struct kvm_vcpu *vcpu)
-{
-	struct kvm_vcpu_events events;
-
-	vcpu_events_get(vcpu, &events);
-
-	events.nmi.pending = 1;
-	events.flags |= KVM_VCPUEVENT_VALID_NMI_PENDING;
-
-	vcpu_events_set(vcpu, &events);
-}
-
-static struct kvm_vcpu *save_restore_vm(struct kvm_vm *vm,
-					struct kvm_vcpu *vcpu)
-{
-	struct kvm_regs regs1, regs2;
-	struct kvm_x86_state *state;
-
-	state = vcpu_save_state(vcpu);
-	memset(&regs1, 0, sizeof(regs1));
-	vcpu_regs_get(vcpu, &regs1);
-
-	kvm_vm_release(vm);
-
-	/* Restore state in a new VM.  */
-	vcpu = vm_recreate_with_one_vcpu(vm);
-	vcpu_set_hv_cpuid(vcpu);
-	vcpu_enable_evmcs(vcpu);
-	vcpu_load_state(vcpu, state);
-	kvm_x86_state_cleanup(state);
-
-	memset(&regs2, 0, sizeof(regs2));
-	vcpu_regs_get(vcpu, &regs2);
-	TEST_ASSERT(!memcmp(&regs1, &regs2, sizeof(regs2)),
-		    "Unexpected register values after vcpu_load_state; rdi: %lx rsi: %lx",
-		    (ulong) regs2.rdi, (ulong) regs2.rsi);
-	return vcpu;
-}
-
-int main(int argc, char *argv[])
-{
-	vm_vaddr_t vmx_pages_gva = 0, hv_pages_gva = 0;
-	vm_vaddr_t hcall_page;
-
-	struct kvm_vcpu *vcpu;
-	struct kvm_vm *vm;
-	struct kvm_run *run;
-	struct ucall uc;
-	int stage;
-
-	vm = vm_create_with_one_vcpu(&vcpu, guest_code);
-
-	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
-	TEST_REQUIRE(kvm_has_cap(KVM_CAP_NESTED_STATE));
-	TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS));
-
-	hcall_page = vm_vaddr_alloc_pages(vm, 1);
-	memset(addr_gva2hva(vm, hcall_page), 0x0,  getpagesize());
-
-	vcpu_set_hv_cpuid(vcpu);
-	vcpu_enable_evmcs(vcpu);
-
-	vcpu_alloc_vmx(vm, &vmx_pages_gva);
-	vcpu_alloc_hyperv_test_pages(vm, &hv_pages_gva);
-	vcpu_args_set(vcpu, 3, vmx_pages_gva, hv_pages_gva, addr_gva2gpa(vm, hcall_page));
-	vcpu_set_msr(vcpu, HV_X64_MSR_VP_INDEX, vcpu->id);
-
-	vm_init_descriptor_tables(vm);
-	vcpu_init_descriptor_tables(vcpu);
-	vm_install_exception_handler(vm, UD_VECTOR, guest_ud_handler);
-	vm_install_exception_handler(vm, NMI_VECTOR, guest_nmi_handler);
-
-	pr_info("Running L1 which uses EVMCS to run L2\n");
-
-	for (stage = 1;; stage++) {
-		run = vcpu->run;
-
-		vcpu_run(vcpu);
-		TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
-			    "Stage %d: unexpected exit reason: %u (%s),\n",
-			    stage, run->exit_reason,
-			    exit_reason_str(run->exit_reason));
-
-		switch (get_ucall(vcpu, &uc)) {
-		case UCALL_ABORT:
-			REPORT_GUEST_ASSERT(uc);
-			/* NOT REACHED */
-		case UCALL_SYNC:
-			break;
-		case UCALL_DONE:
-			goto done;
-		default:
-			TEST_FAIL("Unknown ucall %lu", uc.cmd);
-		}
-
-		/* UCALL_SYNC is handled here.  */
-		TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") &&
-			    uc.args[1] == stage, "Stage %d: Unexpected register values vmexit, got %lx",
-			    stage, (ulong)uc.args[1]);
-
-		vcpu = save_restore_vm(vm, vcpu);
-
-		/* Force immediate L2->L1 exit before resuming */
-		if (stage == 8) {
-			pr_info("Injecting NMI into L1 before L2 had a chance to run after restore\n");
-			inject_nmi(vcpu);
-		}
-
-		/*
-		 * Do KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE for a freshly
-		 * restored VM (before the first KVM_RUN) to check that
-		 * KVM_STATE_NESTED_EVMCS is not lost.
-		 */
-		if (stage == 9) {
-			pr_info("Trying extra KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE cycle\n");
-			vcpu = save_restore_vm(vm, vcpu);
-		}
-	}
-
-done:
-	kvm_vm_free(vm);
-}